Articles | Volume 3, issue 2
Research article
01 Oct 2012
Research article |  | 01 Oct 2012

Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

S. E. Smirnov and Y. V. Marapulets

Abstract. The effect was observed as a sharp fall of the electric potential gradient from +80 V m−1 down to –21 V m−1. After that the field returned to its normal level according to the formula of the capacitor discharge with 17 s characteristic time. Simultaneously, the response of the acoustic emission of surface rocks in the range of frequencies between 6.5 kHz and 11 kHz was evaluated.